Pearce, who was without a phone or television during rehabilitiation, said "the hard work starts for me now."

"I'm a bit jetlagged but it's been a really challenging four weeks. It's something that I really needed to do and the hard work starts for me now.

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Mitchell Pearce addresses the media on his arrival in Sydney from an overseas rehabilitation facility on Sunday morning.

Photo: ABC

"I've got a lot of people to earn respect back off and first and foremost I want to spend today with my family.

"I've been away for a long time. I also want to thank everyone who has given me support.

"I haven't had a phone or TV for four weeks, I've been in isolation, but I've seen a lot of text messages today that have meant the world to me."

"I'm not too sure [what the punishment will be]. I'm coming back here with a clear head and I've got a lot of people like I said to earn respect off. So whatever my punishment I'll be copping it on the chin."

Mea culpa: Mitchell Pearce last month.

Photo: Kate Geraghty

Pearce was met by his parents Wayne and Terri as he arrived at Sydney Airport on Sunday morning ahead of the media conference just after 9am.

The 26-year-old NSW Origin playmaker had been undergoing treatment in northern Thailand after admitting to alcohol problems following the video filmed at a private party.

The footage was sold to media outlets and Fairfax Media reported last week that the Roosters were considering legal action over the breach of privacy.

Pearce was stood down by the Roosters after the incident, which followed a club-sanctioned harbour cruise on Australia Day, and he will face the club's board before it is decided when he can return to playing.

He is expected to be suspended for the opening six matches of the NRL season and fined $50,000.